C++ (Cpp) trace_qemu_anon_ram_alloc 예제들

예제 #1

파일: oslib-posix.c 프로젝트: Anna-Miya-Dan/glusterfs

/* alloc shared memory pages */
void *qemu_anon_ram_alloc(size_t size)
{
    size_t align = QEMU_VMALLOC_ALIGN;
    size_t total = size + align - getpagesize();
    void *ptr = mmap(0, total, PROT_READ | PROT_WRITE,
                     MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
    size_t offset = QEMU_ALIGN_UP((uintptr_t)ptr, align) - (uintptr_t)ptr;

    if (ptr == MAP_FAILED) {
        fprintf(stderr, "Failed to allocate %zu B: %s\n",
                size, strerror(errno));
        abort();
    }

    ptr += offset;
    total -= offset;

    if (offset > 0) {
        munmap(ptr - offset, offset);
    }
    if (total > size) {
        munmap(ptr + size, total - size);
    }

    trace_qemu_anon_ram_alloc(size, ptr);
    return ptr;
}

예제 #2

파일: oslib-win32.c 프로젝트: Acidburn0zzz/qemu

void *qemu_anon_ram_alloc(size_t size)
{
    void *ptr;

    /* FIXME: this is not exactly optimal solution since VirtualAlloc
       has 64Kb granularity, but at least it guarantees us that the
       memory is page aligned. */
    ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
    trace_qemu_anon_ram_alloc(size, ptr);
    return ptr;
}

예제 #3

파일: oslib-win32.c 프로젝트: CTU-IIG/qemu

void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared)
{
    void *ptr;

    ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
    trace_qemu_anon_ram_alloc(size, ptr);

    if (ptr && align) {
        *align = MAX(get_allocation_granularity(), getpagesize());
    }
    return ptr;
}

예제 #4

파일: oslib-posix.c 프로젝트: limboemu/limbo

/* alloc shared memory pages */
void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment)
{
    size_t align = QEMU_VMALLOC_ALIGN;
    void *ptr = qemu_ram_mmap(-1, size, align, false);

    if (ptr == MAP_FAILED) {
        return NULL;
    }

    if (alignment) {
        *alignment = align;
    }

    trace_qemu_anon_ram_alloc(size, ptr);
    return ptr;
}

예제 #5

파일: oslib-posix.c 프로젝트: AnselZhangGit/qemu_stm32

/* alloc shared memory pages */
void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment)
{
    size_t align = QEMU_VMALLOC_ALIGN;
    size_t total = size + align;
    void *ptr = mmap(0, total, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
    size_t offset = QEMU_ALIGN_UP((uintptr_t)ptr, align) - (uintptr_t)ptr;
    void *ptr1;

    if (ptr == MAP_FAILED) {
        return NULL;
    }

    if (alignment) {
        *alignment = align;
    }

    ptr1 = mmap(ptr + offset, size, PROT_READ | PROT_WRITE,
                MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
    if (ptr1 == MAP_FAILED) {
        munmap(ptr, total);
        return NULL;
    }

    ptr += offset;
    total -= offset;

    if (offset > 0) {
        munmap(ptr - offset, offset);
    }
    if (total > size + getpagesize()) {
        munmap(ptr + size + getpagesize(), total - size - getpagesize());
    }

    trace_qemu_anon_ram_alloc(size, ptr);
    return ptr;
}